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What if I did this:


and then run millions of things for about 24 hours. If I dont touch the 'red_door' var, will it be gc'ed after that long period of time?

From: Edgar Toernig <>
To: Multiple recipients of list <>
Subject: Re: Garbage Collection
Date: Mon, 27 Aug 2001 04:26:12 +0200

Denis Lamarche wrote:
> Does Lua garbage collect its own variable or those on the stack or both?
> If I set the gc tag of a lua variable to nil, will it still be collected be
> the gc?

Hmm... you can't set tags on variables. Only on tables and userdata objects.
So I guess you mean that.  Yes, they will be collected.  The gc tag allows
you to set callback functions for userdata objects.  It's just a function
that gets called just before the object is freed.  And the object will be
freed when it's no longer used, whether you set a gc-function or not ;-)

Ciao, ET.

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